According to CanonRumors, a ‘very solid source’ is saying that the 1D MK IV, or 1D Mark IV (4), will be announced on the 20th of October. PhotoRumors has released several of the 1D MK IV rumours previously, but this is the most ‘reliable’ one so far.

There’s also a very high possibility, they claim, that the 1Ds Mark IV will be out next year in Spring (northern hemisphere), and will have a whopping 32 megapixels.